Retirement Benefit Plan - Summary of Amounts Recognized in Balance Sheet (Detail) - USD ($) $ in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| United States [Member] | ||
| Pension Plans, Postretirement and Other Employee Benefits [Line Items] | ||
| Prepaid pension | $ 116.8 | $ 89.0 |
| Short-term accrued benefit liability | (0.1) | (0.1) |
| Long-term accrued benefit liability | (1.1) | (1.1) |
| Net amount recognized | 115.6 | 87.8 |
| Foreign [Member] | ||
| Pension Plans, Postretirement and Other Employee Benefits [Line Items] | ||
| Prepaid pension | 133.6 | 82.5 |
| Short-term accrued benefit liability | (0.4) | (1.3) |
| Long-term accrued benefit liability | (18.9) | (19.2) |
| Net amount recognized | $ 114.3 | $ 62.0 |
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- Definition Amount of asset (liability), recognized in statement of financial position, for defined benefit pension and other postretirement plans. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of asset, recognized in statement of financial position, for overfunded defined benefit pension and other postretirement plans. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of liability, recognized in statement of financial position, for defined benefit pension and other postretirement plans, classified as current. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of liability, recognized in statement of financial position, for defined benefit pension and other postretirement plans, classified as noncurrent. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Pension Plans, Postretirement and Other Employee Benefits [Line Items] No definition available.
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